Improvement in flour and middlings purifiers



BR 0 WN; x

-P-uriers Patented Feb. i7

lll Il mvenon:

A'runNEYs.

UNITED STATEs NPATENT OEEIGE AGEORGE W. BROWN, OF METROPOLIS, ILLINOIS.

IMPLROVEMENTIN FLOUR AND MIDDLINGS PURIFIERS'.

Specification forming part of Letters Patent No. 147,59, dated February 17, 1874; application filed f January 5, 1874i.

To all whom it may concern:

Be it known that I, GEORGE W. Buowv,`

of Metropolis, in the county of Massac and State of lllinois, have invented a new and Improved Flour and Middlings Purifier, of which the following is a specification:

other devices necessary to form. a complete orA operative machine. r l

Figure 1 is a longitudinal sectional elevation of my improved bolting apparatus, and Fig. 2 is a transverse section taken on the line x x of Fig. 1,. A

Similar letters of reference indicate correspondin g parts.

A and B represent the bolting-chest, which will be lined or sheathed with thin sheet metal, strong paper, or any other suitable substance capable of preventing air from entering` or escaping except at the passages provided for it. U represents an air-chamber partitioned oft' from the reel-space at the head of the chest, and D is another at the tail. `E is a pressureblower connected with chamber C, and F is a suction blower connectedA with chamber D. The blast fan E and the suctionfan F will have regulatinggatcs for controllingtheblasts. H represents long air-trunks extending the whole length of the chest at the top, and communicating with airchambers C and l) by passages Gr, also communicating with the reelspace by t-he passages J, havingregulating gates or valves l. L are other longitudinal trunks extending along the sides at the top of the fall-boards, and also communicating with air-chambers G and D by passages Gr, and with the reelspace by the passages M, the latter being regulated by valves N. O is alarge tube extending from air chamber C to D, through the reelspace above the reel, and .having a long slot or perforations in the lower side to discharge the air down upon the reel for olea-ring it by blowing through the meshes. l is a large perforated tube surrounding the reel-shaft, and extending from airchamber C through the partition separating it from the reel-space into the latter, and nearly to the tail end, to conduct air from chamber O into the reel and distribute it in all directions. Q represents long radial vanes or plates attached to the perforated tube and the reel-arm, to direct the air distributed from the perforated tube upon the reel-cloth equally, also to aid in separating the material to be bolted. At the tail end of the tine cloth or screen it is enlarged a little, as shown at R, -for the application of a smooth wide ring, S, of thin sheet metal at the point where the coarse taiLscreen T is connected. Within this ring the mouth of a large sheetmetal funnel, W, terminates, which extends at its smaller end into the airspace D, passing out through the tail end of the reel, which is otherwise closed.

The pressure-blower is designed to blow air directly into the reel through the perforated tube, or into the reel-space through chambers H or L, or through the pipe or tube O, while the suctionfan is to draw the air out through the funnel, also through trunks H.

Then purifying flour, the tail end X of the reel is removed to pass the bran and other offal to the space below, but for middlin gs it is left on, as represented in the drawing, and the suction is allowed to draw through the funnel NV.

The general idea of the invention is to enable the attendant to force any amount of air that may be required into the chest or inside the reel, or both, and withdraw it, as may be required by the different kinds, qualities, and conditions of gra-in, suitable valves being em ployed to regulate and control the currents.

By the long trunks H along the top of the chest communicating with both air-chambers O and D, air may be blown into the reelspace with the pressure-fan, or sucked out to draw out impurities with the other.

By the trunks L along the sides of the reel above the fallboards, air is to be forced in below the reel to clean the taltboards and facilitate the descent of the tlour to the conveyer below, also toact on the under side of the reel. The perforated tube P on the shaft facilin tates the separation ofthe material bolted by the jets of air it lets in from the pressurechamber C. The coarse-Wire wings on the perforated tube separate the material falling 0n them. The smooth ring S, fitted in the en l larg-cd portion of the rcel at the mouth ofthe funnel, is to carry the remaining uuboltedmaterial quickly under or beyond the mouth of funnel to the coarse tail-screen Z beyond, or be passed out at the tail end to a receiver below. The funnel is for drawing the impurities out of that portion of the rcel through which the ne matters are bolted, While preventing the esca-pe of the coarser particles froin the tail portion.

The material collecting in the suction-chamber will be removed from time to time through a suitable aperture therefor in the case, having a door or gate for closing it.

Having thus described my invention, I claim as new, and desire to secure by Letters Patentand fall-boards, substantially as specified.

3. The combination of the sheet-metal band S With the reel and funnel, substantially as specified.

GEORGE WASHING-TON BROWN. Witnesses J. L. Gnnnnn'r, W. OVERTON. 

